A235753 Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

498, 6578, 88732, 996868, 10878790, 107853469, 1029949275, 9302743070, 81316688449, 685961142966, 5640598983182, 45276049481160, 356582305997562, 2761470374653164, 21093423476878067, 159232955530020990

Offset

1,1

Comments

Column 2 of A235756

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..1..2..0....0..0..1....1..0..2....2..2..1....1..2..2....2..2..2....0..1..1
..1..1..1....1..2..1....1..2..2....2..2..2....0..2..1....0..1..2....1..2..2
..0..0..2....0..0..0....1..0..1....1..0..2....2..1..0....1..2..1....0..1..1
..0..2..2....2..0..1....0..2..2....1..2..0....0..2..1....0..0..2....2..0..2

Crossrefs

Sequence in context: A064255 A067917 A093249 * A235528 A277785 A339622

Adjacent sequences: A235750 A235751 A235752 * A235754 A235755 A235756

Keyword

nonn

Author

R. H. Hardin, Jan 15 2014

Status

approved